That's a connection board for the analog computer Confetti. If one has connected some Confetti modules with the Confetti310 Hexacorner to a hexagon, for example for a ring of Confetti Neurons, that board could be used for an extra connection outside the circle.
For building the Hexaconnector board one needs to cut two copper stripe proto boards in the following way:
The two copper stripes for the two buses and the three stripes for power on the back of the board should be soldered together.
The Confetti312 Hexaconnector II was designed by Wolfgang Spahn 2019.
It is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.